Time for a new ReadyNas and have Q's.

petensyd - you might consider doing an initial backup to the new unit with NFS, verifying the backup with rsync and then reversing the unit, making the newer faster unit the primary and the older and slower, but still reliable NV+, the backup. I ran with an NV+ as my only unit for about 3 years, then purchased a new faster x-86 based 4 bay NAS (the NVX at the time) and after getting the data moved over made it the primary. I never regretted that, and I had the NVX back up all data every night to the NV+ automatically. (I later got a good deal on a second NVX and the NV+ became a spare until I gave it to a friend to get him started.

Keep in mind that the NV+ v2 now on the market is an entry level machine as opposed to the mid-level Ultra 4/Ultra 4 Plus series and upper end Pro series.